Here's a look at tonight's sci-fi TV:
FlashForward, 'Revelation Zero' – FlashForward heads back to ABC with an answer to one of the series' biggest questions: Who is Suspect Zero? We'll find out tonight as Demetri teams up with CIA agent Vogel to find Lloyd, and Mark sits through a therapy session to get back his badge. Elsewhere, Janis uncovers some of Simon's family secrets, and later Mark discovers an unnerving truth: Another worldwide blackout is on the way. Guest star Ricky Jay returns, apparently to terrorize Simon and Lloyd. (8 p.m. ET on ABC)
Archer, 'Dial M for Mother' – Archer falls into a trap while searching for clues to his father's identity in the animated spy comedy's season finale. (10 p.m. ET on FX)
Head after the jump for clips and more TV picks.